The Brushless DC motors promote extended service life without maintenance and a patented double diaphragm system imparts superior levels of gas tightness and leakage prevention, according to the manufacturer. These pumps have additionally been tested and certified by DVGW (an independent safety authority based in Germany) for approved use in fuel cell applications. The pumps deliver natural gas to system “reformers,” which heat the gas to produce hydrogen and then deliver the hydrogen to the fuel cell. Their oil-free operation eliminates any risk of gas contamination to allow for pure transfer. Depending on model, these pumps can achieve maximum flow rates up to 25 l/min, maximum vacuums up to 200mbar, and maximum pressure up to 15 psig. They exhibit significantly low leak rates of 6 x 10-4 mbar l/s. Custom pump solutions can be developed to meet particular application demands.